Phosphorus Distribution in Sequentially Extracted Fractions of Biosolids, Poultry Litter, and Granulated Products
Phosphorus Distribution in Sequentially Extracted Fractions of Biosolids, Poultry Litter, and Granulated Products
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DOI：
10.1097/ss.0b013e3181dae29e
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发表时间：
2010-04-01
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影响因子：
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通讯作者：
Reiter, Mark S.
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文献类型：
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作者：
He, Zhongqi;Zhang, Hailin;Reiter, Mark S.
土地利用生物固体和家禽粪便可以提供磷(P)、其他养分和有机质，从而有利于作物生产。然而，这些废物中施入的磷的生物有效性直接取决于特定磷形态的存在。在这项研究中，我们通过连续分级(即H2O、0.5M NaHCO3、0.1M NaOH和1M HCl)和酶解相结合的方法比较了生物固体和肉鸡窝中的P形态。肉仔鸡粪便中可提取磷的大小顺序为：HCl>；H2O>；NaOH>；NaHCO3。四个组分中的生物固磷含量顺序为：HCl>、NaOH>、NaHCO3>、H2O。相关分析表明，磷与钙、锰、锌、铁、铝共提取，而镁不存在。肉鸡凋落物中的大部分磷是以钙结合的，而铝、锰和锌在生物固体中的金属磷形态中起着更重要的作用。各组分P形态的相对丰度为无机P>；可水解性有机P>；非水解性有机磷。与冷藏样品中的磷水平相比，室温下储存的肉鸡窝样将盐酸部分植酸磷转化为其他形式，导致H2O组分中更多的活性磷。家禽粪便和生物固体颗粒化产品可作为场外营养源。本研究的数据表明，颗粒化将鸡粪中中等的NaHCO3-和NaOH可提取磷双向转化为不稳定的水溶磷和稳定的HCl可提取磷，但并未显著改变含有鸡粪和生物固体的颗粒物中H2O-、NaHCO3-和NaOH可提取磷的分布。
Land application of biosolids and poultry litter can benefit crop production by providing phosphorus (P) and other nutrients and organic matter. However, the bioavailability of applied P in those waste materials is directly dependent on the presence of specific P forms. In this study, we comparatively examined the P forms in biosolids and broiler litter by sequential fractionation (i.e., H2O, 0.5 M NaHCO3, 0.1 M NaOH, and 1 M HCl fractions) coupled with enzymatic hydrolysis. Extractable P in broiler litter was found in the order of HCl > H2O > NaOH > NaHCO3. Biosolid P was found in the four fractions in the following order: HCl > NaOH > NaHCO3 > H2O. Correlation analysis indicated that P was coextracted with Ca, Mn, Zn, Fe, and Al, but not Mg. Whereas most P was Ca bound in broiler litter, Al, Mn, and Zn played more important roles in metal P species in biosolids. The relative abundance of P species was determined to be inorganic P > hydrolyzable organic P > nonhydrolyzable organic P in each fraction. Compared with the P levels in the samples stored in a freezer, storage of the broiler litter sample at room temperature transformed part of the phytate P in the HCl fraction to other forms, resulting in more labile P in the H2O fraction. Granulated products of poultry litter and biosolid could be used as off-farm nutrient sources. Data in this work show that granulation transformed moderate NaHCO3- and NaOH-extractable P bilaterally to labile water-soluble P and stable HCl-extractable P in the granulated poultry litter but did not remarkably change the distribution of H2O-, NaHCO3-, and NaOH-extractable P in granulated products containing both poultry litter and biosolids.